The quality of being very hard to please or excessively particular about small details.
From Latin 'fastidiosus' meaning 'squeamish' or 'disgusted,' derived from 'fastidium' (disgust). The suffix '-osity' transforms it into an abstract noun describing the state or quality of being fastidious.
This word perfectly captures that person who won't eat a sandwich because the bread isn't cut diagonally, or who reorganizes the spice rack by color—it's such a specific human quirk that the Romans had a word for it over 2,000 years ago!
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